ron james wrote:
hi- read so many reviews on zoom lenses that getting a headache - can anybody suggest a lens for my Nikon D7500 for nature use without breaking my bank - so far top of my list is a Sigma 150-600mm sport 2nd hand average price around £950 or is there an alternative at less money out there - water birds being main target for photographs - I do have a Nikon 70-300mm but looking for more reach
I had a 600mmF4, and though it was optically excellent, it got heavy after a while. It was also not possible to use without a tripod.
So,
I started the search. I found this article that influenced my eventual choice.
https://photographylife.com/reviews/nikon-200-500mm-f5-6e-vri have borrowed the 80-400 and the 200-500 from NPS - and found the article to be on-point. And I wanted something that was closer to the 600mmF4 I was planning on selling once I found a suitable alternative. I looked at (borrowed from friends) the original 150-600 Tamron (not any better than the Nikon, only a little longer), and the 150-600 Sigma Contemporary - which I was not happy with at all.
I was waiting for the newly announced Tamron G2, but GAS got the better of me and I picked up the Sigma Sport. The comment in the review that it was a cut above the rest intrigued me, so I found a used one for $1100 and bought it. In retrospect, I might have been happier with the Tamron G2, because the ones that I have tried were just as good as the Sport, and almost 2 lb lighter. Build quality is better on the Sigma.
I found both the Sport and the G2 noticeably sharper than the Nikon, though not by a big difference. My final decision was based on how close the lens I selected was to the 600mmF4. The G2 and Sport were quite close.
I usually make decisions based on cost and performance. In this case, the cost was not a deciding factor since I was replacing a much more expensive lens. I just needed it to be very sharp and hand-holdable. The Sport - and later the G2 - satisfied my performance standards. The Nikkor didn't quite make the cut. I'm not saying it's a bad lens - not in the least. It just wasn't 600mm, did not have the environmental sealing, it did not work well at all with a 1.4 TC, though it was pretty darn close with without the TC, and having been newly released, it was only being sold for $1400. On the plus side, the autofocus was a little snappier, and the stabilization was perceptibly better. However, if you look at the last pair of images, you'll see that when it comes to stabilization, the worst one of the bunch, the Sigma Sport, was stable enough to shoot at 1/25 second hand held.